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DE68913442D1 - Microcomputer with EEPROM. - Google Patents

Microcomputer with EEPROM.

Info

Publication number
DE68913442D1
DE68913442D1DE89121854TDE68913442TDE68913442D1DE 68913442 D1DE68913442 D1DE 68913442D1DE 89121854 TDE89121854 TDE 89121854TDE 68913442 TDE68913442 TDE 68913442TDE 68913442 D1DE68913442 D1DE 68913442D1
Authority
DE
Germany
Prior art keywords
cpu
eeprom
data write
data
write
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE89121854T
Other languages
German (de)
Other versions
DE68913442T2 (en
Inventor
Toshiyuki C O Nec Corp Kataoka
Kazutoshi C O Nec Co Yoshizawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC CorpfiledCriticalNEC Corp
Publication of DE68913442D1publicationCriticalpatent/DE68913442D1/en
Application grantedgrantedCritical
Publication of DE68913442T2publicationCriticalpatent/DE68913442T2/en
Anticipated expirationlegal-statusCritical
Expired - Fee Relatedlegal-statusCriticalCurrent

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Abstract

A microcomputer includes a central processing unit (CPU) and an electrically erasable and programmable nonvolatile memory (EEPROM) fabricated on a single semiconductor chip. When CPU issues a data write request to EEPROM, a data write control circuit is initiated to perform a data write-processing in which data in an address of EEPROM selected by CPU is first erased and thereafter data from CPU is written into that selected address. There is further provided an over-write detection circuit for detecting that CPU issues another data write request to EEPROM while the data write control circuit is performing the data write-processing and for producing an over-write detection signal to CPU.
DE68913442T1988-11-251989-11-27 Microcomputer with EEPROM.Expired - Fee RelatedDE68913442T2 (en)

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP63298518AJPH02144641A (en)1988-11-251988-11-25Microcomputer

Publications (2)

Publication NumberPublication Date
DE68913442D1true DE68913442D1 (en)1994-04-07
DE68913442T2 DE68913442T2 (en)1994-11-24

Family

ID=17860761

Family Applications (1)

Application NumberTitlePriority DateFiling Date
DE68913442TExpired - Fee RelatedDE68913442T2 (en)1988-11-251989-11-27 Microcomputer with EEPROM.

Country Status (4)

CountryLink
US (1)US5307470A (en)
EP (1)EP0370529B1 (en)
JP (1)JPH02144641A (en)
DE (1)DE68913442T2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH04114289A (en)*1990-09-041992-04-15Mitsubishi Electric Corp Data rewriting circuit for microcomputer integrated circuit device
US5546561A (en)*1991-02-111996-08-13Intel CorporationCircuitry and method for selectively protecting the integrity of data stored within a range of addresses within a non-volatile semiconductor memory
JP3408552B2 (en)*1991-02-112003-05-19インテル・コーポレーション Circuit and method for programming and erasing nonvolatile semiconductor memory
EP0907142B1 (en)*1992-04-022007-06-13Kabushiki Kaisha ToshibaMemory card apparatus
JPH06191093A (en)*1992-12-251994-07-12Fuji Xerox Co LtdRecorder
JP3424262B2 (en)*1993-04-212003-07-07ヤマハ株式会社 Online karaoke system
JPH0721790A (en)*1993-07-051995-01-24Mitsubishi Electric Corp Semiconductor integrated circuit
US5559988A (en)*1993-12-301996-09-24Intel CorporationMethod and circuitry for queuing snooping, prioritizing and suspending commands
US6618117B2 (en)1997-07-122003-09-09Silverbrook Research Pty LtdImage sensing apparatus including a microcontroller
US7551201B2 (en)1997-07-152009-06-23Silverbrook Research Pty LtdImage capture and processing device for a print on demand digital camera system
US6879341B1 (en)1997-07-152005-04-12Silverbrook Research Pty LtdDigital camera system containing a VLIW vector processor
US7110024B1 (en)1997-07-152006-09-19Silverbrook Research Pty LtdDigital camera system having motion deblurring means
US6263398B1 (en)*1998-02-102001-07-17Ramtron International CorporationIntegrated circuit memory device incorporating a non-volatile memory array and a relatively faster access time memory cache
JP2002133878A (en)*2000-10-232002-05-10Hitachi Ltd Nonvolatile memory circuit and semiconductor integrated circuit
JP3853188B2 (en)*2001-10-042006-12-06Ｎｅｃエレクトロニクス株式会社 Asynchronous bus interface device
US7149119B2 (en)*2004-09-302006-12-12Matrix Semiconductor, Inc.System and method of controlling a three-dimensional memory

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4212057A (en)*1976-04-221980-07-08General Electric CompanyShared memory multi-microprocessor computer system
JPS58184668A (en)*1982-04-221983-10-28Fanuc LtdControl system for writing to memory
DE3380465D1 (en)*1982-09-201989-09-28Toshiba KkVideo ram write control apparatus
US4644494A (en)*1984-02-061987-02-17Sundstrand Data Control, Inc.Solid state memory for aircraft flight data recorder systems
JPS62164299A (en)*1986-01-131987-07-20Mitsubishi Electric Corp microcomputer device
JPS62202294A (en)*1986-02-281987-09-05Casio Comput Co Ltd counter device
JPH0636197B2 (en)*1986-04-161994-05-11日本電気株式会社 Micro computer
JPH02500143A (en)*1987-07-231990-01-18エヌ・シー・アール・コーポレーシヨン computer system
KR920007501B1 (en)*1988-02-041992-09-04요꼬가와덴기 가부시기가이샤Signal conditioners

Also Published As

Publication numberPublication date
EP0370529A3 (en)1991-05-15
JPH02144641A (en)1990-06-04
US5307470A (en)1994-04-26
DE68913442T2 (en)1994-11-24
EP0370529A2 (en)1990-05-30
EP0370529B1 (en)1994-03-02

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Legal Events

DateCodeTitleDescription
8364No opposition during term of opposition
8339Ceased/non-payment of the annual fee
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